Viewing my objects in the default 3d (iso) view
This is the default view Blender starts at. There is nothing special about it, so there naturally is not hotkey. However, you can restore this view by assuming its position by rotating the interface.
I am unsure from your question whether or not you are actually able to rotate the viewport. If you cannot, simply hold down the middle mouse button on your mouse and move around. If you do not have a middle mouse button/ are using a touchpad, then you can go to user preferences, and enable &quot;Emulate three button mouse&quot;. This allows you to rotate the viewport by holding the left mouse button, and pressing the Alt key on your keyboard.
If you, however, can rotate the interface and I am mistaken, you can, immediately after opening Blender, press Ctrl+Alt+0 on your keyboard to align the camera to that default view. Make sure you have not already moved the interface around.
As I said previously, there is no &quot;default&quot; key to this view, so you must align your camera to the view if you want to get it again. If you don't want to do this, you can try to achieve the same view by rotating your viewport.
I hope this helps.